History 153 Indians of North America 78 Social aspects 28 Emigration and immigration 27 Free trade 27 Politics and government 22 Race relations 22 more ... Social conditions 21 History and criticism 20 Indians, Treatment of 20 Ethnic relations 17 Government relations 17 Relations 16 Description and travel 15 Intellectual life 15 American literature 14 Indian art 14 Racism 13 Americas 12 Antiquities 12 Civilization 12 Geographic Locations 12 Geographicals 12 Indians in literature 12 Territorial expansion 12 Border security 11 Boundaries 11 Foreign economic relations 11 International relations 11 Noncitizens 11 less ...